#1F34B0#1F34B0

#1F34B0 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.4% C 0.196 H 267.8°. Best body text is #FFFFFF at 9.65:1 contrast (WCAG AA passes).

Color values

HEX	#1F34B0
RGB	rgb(31, 52, 176)
HSL	hsl(231, 70%, 41%)
HSV	hsv(231, 82%, 69%)
CMYK	cmyk(82.4%, 70.5%, 0%, 31%)
CIE-LAB	lab(29.11, 38.63, -67.46)
CIE-LCH	lch(29.11, 77.74, 299.80°)
OKLab	oklab(40.45% -0.0074 -0.1955)
OKLCH	oklch(40.45% 0.196 267.8)
XYZ	xyz(9.6268, 5.8807, 41.6936)
Luminance	0.0588 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.94

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F34B0 #B09B1F

analogous

#1F7DB0 #1F34B0 #521FB0

triadic

#1F34B0 #B01F34 #34B01F

tetradic

#1F34B0 #B01F7D #B09B1F #1FB052

square

#1F34B0 #B01F7D #B09B1F #1FB052

split-complementary

#1F34B0 #B0521F #7DB01F

monochromatic

#0D1548 #16257C #1F34B0 #314ADB #6578E4

Accessibility & contrast

On white

9.65

#1F34B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#1F34B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F34B0

9.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F34B0	#FFFFFF	#000000	##FFFFFF
##1F34B0	1.00	9.65	2.18	9.65
#FFFFFF	9.65	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CB4

Deuteranopia (green-blind)

#003EAE

Tritanopia (blue-blind)

#00576E

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1f34b0;
/* rgb */ color: rgb(31, 52, 176);
/* oklch */ color: oklch(40.4% 0.196 267.8);

Tailwind

colors: {
  custom: {
    50: '#766cc9',
    500: '#1f34b0',
    950: '#000000',
  },
}

SCSS

$custom: #1f34b0;
$custom-light: #766cc9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f34b0",
  "rgb": {
    "r": 31,
    "g": 52,
    "b": 176
  },
  "hsl": {
    "h": 231.31,
    "s": 70.048,
    "l": 40.588
  },
  "oklch": {
    "l": 0.40448,
    "c": 0.19562,
    "h": 267.8
  },
  "luminance": 0.05882
}

Semantic roles & 50–950 ramp

primary

#1F34B0

secondary

#C9BA62

accent

#D33BED

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #1F34B0

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →